Eyeglasses.



S. NORDEN.

BYBGLAssBs.

APPLICATION IILED JUNE 24, 1912.

Patented Sept. 23, 1913.

FTSE.

INVENTUR jm y @/7 ATTEJRNEY UNITED STATES PATENT OFFICE.

SVAN NOEDEN, OE PROVIDENCE, RHODE ISLAND, ASSIGNOE To EREDEEICK A. STEVENS, OF PROVIDENCE, RHODE ISLAND.

EYEGLASSES.

Specification of Letters latent.

Patented Sept. 23, 1913.

Application med .Tune 24.-, 1912. sei-iai No. 705,369.

To all whom t may concern.'

Be it known that I, SVAN NORDEN, a citizen of the United States, residing at Provi dence, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Eyeglasses, of which the following is a specification.

My invention relates to eyeglasses, and more particularly to that type commonly known as finger piece structures wherein the nose engaging members are pivotally mounted at either side of the comparatively rigid bridge.

The objects of my invention are to strengthen the action oir' the guards, at the Same time insuring a maximum durability and compactness of structure of the actuating agent or spring which is of advantage in the action and appearance of the mounting parts.

The spring members of eyeglasses, in order to be effective, must be made of metals of so hard a character as tov soon crystallize and become brittle, particularly if the spring member comprises but a few coils, as is the case with the present spring members, such as volute springs and helical springs. In the latter two springs it would be essential, in order to secure a proper length of spring to Overcome the trouble that Jthe depth of coils of the helical spring, or the Outer diameter of the coils of the volute spring, be increased to such an extent as to be unsightly and to interfere with the adjacent parts of the mounting frame.

To the end of Overcoming the above disadvantages my invention consists in such parts and combinations of parts asv fall within the scope of the appended claims.

Figure 1 is a front elevation of a pair of eyeglasses embodying this invention, Fig. 2, a plan view of' one oi' the guards and the parts adjacent thereto, Fig. 3, a section on line a' oi" Fig. 2, Figs. 11 and 5 are plan and side elevations respectively of the spring member, and Fig. 6, a section of the same on line y 1/ of Fig. 4.

Like reference characters indicate like parts throughout the views.

In the drawings, 1 represents the lenses carried by a support comprising the lens attaching perforated lugs 3 and the vertical bearing lugs 4. The former lugs are attached by the usual screws 5. An arched and comparatively rigid bridge 6 connects the lens attaching devioes through horiontal connecting or supporting portions 7. Upon the portion 7 is aV pivot member of any usual construction. In the present instance it consists of an integral interioily threaded hollow post 10 attending upwardly, and a similar post 12, extending downwardly, from the support 7 in alinement with cach other. In the post l0 is the shank 14.- of a screw provided at its end with a head 15 in contact with the en'd of the post and of greater' diameter than the post. The threaded shank 17 ol a second screw is engaged in the threaded post 12; this screw carries a head 19 contacting with the end of the post and overlapping the operating arm 21 mounted to swing upon the post or pivot 12 which passes loosely through an opening 22 in the arm.

My novel spring member 24 rests upon the support 7, and around the post 10, and in contact with the screw head 15. It will be understood that the positions of the arm 21 and spring member 24 may be reversed, and that any form of post or pivot may be employed, or the shank of a screw alone may be used as a post, without departing from the spirit of my invention.

The guard arm in the present instance terminates, at its rear end, in a nose bearing portion 26; and at its forward end, in the operating lug 27.

The spring 24 is made from a single piece of resilient metal preferably substantially cylindrical or Oval in cross section, and comprises an upper coil or convolution 30 terminating in an arm 31 and merging into a second coil 32 of less diameter than the coil 30, and located in substantially the same plane and continued downwardly to form a third coil 33 of substantially the same di-A ameter merging' into a fourth coil 3a which lies in substantially the same plane as the coil 38 and is ot' substantially the same diameter as the coil 30, and terminates in anY arm 36. It will be observed that the coils 30 and 33 lie in substantially parallel pla-nes, nearly contiguous to each other, oc"- cupying a minimum of space in a vertical direction, and that a maximum of strength is imparted to the entire spring member by the two central coils 32 and 33 of reduced diameter, the latter two coils not only compensating for the more diffused character of the upper and lower coils, but without ap- Y guards comprising out the disadvantages of either of the latte-i" forms, and of va--constructioii permitting a maximum of material in a minimum -of space. Y n

,The arm 31 inthe presentinstance bears "at'gariiistthelug'et'of' the lens attaching device", while the arm tion of the operating arm 2l at a point behind the post l0.

36 engages the rear-por- The sprin'gmember 24e normally presses the nose bearing portion or pad 26 inwardly against the surface'of the nose, and the arms 21 are operated through the members 27 by thethumb and finger in the usual manner employed in this type of eyeglasses.

What l claim is,-

l.' lnan eyeglass mounting, the combination with a support, and a nose guard pivotally mounted thereon, of a coil spring for positioning the guard having its axis coincident with Vthe turning axis or' the guard, said spring comprising coils one within the other upon opposite sides of the central portion of the spring, he coils upon one side extending in' a direction opposite to those on the' other side of said central portion.

In yan eyeglass mounting, a coil spring for' positioning the guard having its axis coincident with the turning axis of' the guard, said springy having inner and outer coils of different diameters and a connecting portion intermediate the inner andouter coils intermediate the ends of the spring.

, SQA spring for iinger piece eyeglass guards comprising two superposed flat spiral 'coils formed from a single continuous strip of material.

@ik A spring fory finger piece eyeglass guards rcomprising two superposed flat spiral'coils having portions of their respective inner ,convolutions integrally connected together.

5. A 'spring' for 'linger piece eyeglass two superposed flat spiral coils, the inner end or each coil being connected to that. of the other andthe outer end of each being free.

6. A spring. for finger piece eyeglass guards comprising two superposed fiat spiral coils formed from a single continuous Copies of this patent may be obtained for ve cents each, by addressing the Washington, D. C.

strip of material. and lying in contact with each other.

7. A spring for fingerpiece `eyeglass. guards comprising a flat spiral coil having its inn-er convolution continued laterally of the plane of the coil and thence looped in substantial parallelism to such plane to produce a further resilient portion and bringing the extremity of the spring strip Vtoward the outer periphery of the coil whereby both ends of the spring are exteriorly arranged for purposes of attachment.

the combination kwith a support, a guard leone of said parts, of aspring for the guard comprising two superposed'iiat spiral coils surrounding the post as a oentering projection and formed of a single strip of resilient material' having one end against the support.

9. ln a finger piece eyeglass mounting, the combination with a support, a guard lever arranged to turn thereon and a post on one ofv said parts, ofa spring for positioning the guard comprising two superposed flat spiral coils wound in opposite directions about the post as a centering projection, the coils spective inner convolutions and having their outer convolutions actingv againstthe guard and. support, respectively'. y

l0. ln an eyeglass'mounting, the combiranged to turn thereon and a post on one of said parts, of a yspring for positioning the guard comprising a flat spiral coil surroundingV the post as a centering projection, the outer convolution thereof being arranged to act against one of said iirstl mentioned parts and the inner convolution being continued laterally of the plane of the. coil'and thence looped in substantial parallelism to such plane to produce a further resilient portion and bringing ther extremity of thejspring strip toward the outer periphery of the Acoil for-attachment to the other of said first mentioned parts. x v f in testimony 1 whereof l have affixed' my signature in presence vofltwo witnesses.

itn-esses: y

CLIFFORD S. Townn, Horario E, BnLLows.

Commissioner of Patents,

-Sfn a finger piece'eyeglass-mounting,

being joined together at points on theirre- .Y

sviiu Nonnen; 7

ver arranged to turn thereon and a )oston -I 7 n n u positioning acting against the guard and the other nation with a support, a guard lever ar- I'. 

